Concrete pipe.



E. S. WORTHAM. CONCRETE HPB.y APPLIOATION FILED JULY 8. 1911.

Patented Jan. 16, 19:12.

- Chicago,

ELLIOTT s..wonrimm, or cHIcAGo, ILLINOIS.

CONCRETE PIPE.

specification of Lettersratent.

Applicationiiled July 8, 1911.

To all who-m t may concern.' 1

Be it known that I, ELLIOTT S. Woii'rHAM, a citizen of the United States, residing at in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Concrete Pipes, of which the following is a specification.

My invention relates to a simple, economicaland eiiicient means for permanently 'joining the meeting ends of adjacent concrete pipe sections, which means also enable pipe sections to be drawn inclose contact, besides servingas reinforcing members in the concrete.

To these ends, therefore, the. invention consists in the structure shown in the accompanying drawing, in whichM Figure 1 isaperspective view of a con# crete pipe having my improved fastening device'embedded therein; Fig. 2 is a side elevational .view of a concrete pipe section,

part of which is broken away and other parts Ain -section' showing my improved fas- A tening means. i

Referring now more vparticularly to the drawing, the pipe 3 .herein shown is annular in cross-section, although it is obvious that it may be of any desired shape, and is provided with a bell mouth 4 at one end and a lip 5 at its other end; the lip being preferably tapered for complementary engagement with the tapered interior surface G of the l bell mouth 4. The lip 5 terminates in a shoulder 7 while the tapered surface 6 terminates in a shoulder 8, so that when the tapered lip of one pipe sectionv is brought.

into engagement with the bell mouth of an adjacent pipe section, the end of the lip abuts against the shoulder 8 and the end of the bell mouth abuts against-the shoulder 7.l

The construction so far described is of a'n old and well-lrnown character and constitutesalone no part of my invention, which resides in the means for drawing and holding abutting ends of pipe sectionstogether.

I accomplish the objects of my invention by embedding a plurality of retaining devices 9 in the body of each pipe -section which-are arranged circumferentially and. extend longitudinally thereof; one end 10 of `each retaining device projecting from the Serial No. 637,453.

body of each section near its lip endY and the other end 11 of'- each retaining Adevice projecting from the body of each section near its bell mouth end. These retaining de- ,5

vices also serve as reinforcing members for the concrete. The retaining devices are uniformly spaced apart upon each section so that when two sections are brought together for complementary engagement,the 'retaining devices may be brought into registering.

or longitudinal alinement and the adjacent ends of the retaining 'devices are then:

Patented` J an, 16, 1912.

twisted together, as shown at 153, formino a mechanical lock or union to hold the pipe sections together. In the preferred form I provide washers 13 through which each pair.k of oppositelydisposed or adjacent ends eX- tend, but it is obvious that thewashers can 76.

be omitted if desired.

The manner of joiningtwo or more sections is substantially' as follows: The lip end of one pipe section is inserted within the bell mouth of' an adjacent'pipe section so as to bring the projecting ends ofthe retaining devices on one section opposite the pro jecting ends on the other section. The washers are then slipped over opposite ends, whereupon the ends are twisted, which draws the meeting surfaces of-adjacent pipe4 sections together' and irmlyholds the same,

preventing their separation'.

Having now 4describedHmy invention, I claim:

.The combination with a plurality of conf crete pipe sections, each section having aA mouth at one end and a lip at its other end for complementary engagement with the mouth of an adjacent pipe section, of a plu` rality of fastening wires embedded in each section and having their-ends projecting ess.

teriorly of each section. n earboth of. its ends to bind the mouth nd lipV portions ttl) thereof, whereby the projecting endsof the i `wires ofv adjacent pipe sections lmay be twisted together for drawing aid holding said vadjacent pipe sections together ELLIOTT s. woR'ri-IAM.

Witnesses:

SADiE M. RYAN, JAMES R. EFIELD. 

